Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D28/00—Shaping by press-cutting; Perforating
  • B21D28/24—Perforating, i.e. punching holes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D28/00—Shaping by press-cutting; Perforating
  • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
  • B21D28/12—Punching using rotatable carriers
  • B21D28/125—Punching using rotatable carriers with multi-tools
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D28/00—Shaping by press-cutting; Perforating
  • B21D28/24—Perforating, i.e. punching holes
  • B21D28/36—Perforating, i.e. punching holes using rotatable work or tool holders
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T83/00—Cutting
  • Y10T83/869—Means to drive or to guide tool
  • Y10T83/8727—Plural tools selectively engageable with single drive
  • Y10T83/8732—Turret of tools

Definitions

• the invention relates to a tool for a machine tool for machining, in particular for cutting and / or forming, of plate-like workpieces, in particular of sheets with
• first tool part which is drive-connectable with a lifting drive
• second tool part wherein the first tool part and the second tool part can be assigned to sides of a workpiece to be machined, which lie opposite one another along a stroke axis
• Rotary movement of a hemein monoen activation element about an activation axis of rotation different device pairings, each with a processing device and a counterpart device for workpiece machining can be activated.
• the invention relates to a machine tool with such a tool.
• multitools Tools of the above type are referred to as “multiple tools", or as “multitools”.
• multiple tools from the document DE-A-10 2005 005 214 known.
• the prior art tool has an upper tool drivingly connected to a lifting drive with a plurality of punching / forming dies of different shape.
• An associated lower tool has a corresponding number of punching / forming dies whose geometry is matched to that of the respectively associated punch.
• the punch which is part of the punch / die mating to be activated, is transferred to a position in which it protrudes toward the workpiece with respect to the other punches. Accordingly, the activation device of the previously known tool or the previously known machine tool is provided on the drive connected to the lifting drive upper tool.
• the present invention has set itself the goal of increasing the performance of conventional workpiece machining.
• the activation device is not provided on the drive-connected with a lifting drive, but rather on the second tool part.
• that counterpart device which is part of the device pairing to be activated is converted into a functional position according to the invention.
• the counterpart device in question stands out from its position in the case of workpiece machining in the event of an inoperative state towards the workpiece.
• the tool according to the invention or the machine tool according to the invention perform workpiece machining, which can not be performed with a tool or with a machine tool according to the prior art without tool change. Furthermore, the tool according to the invention has a low interference contour in the immediate vicinity of the workpiece.
• an additional activation device is provided on the first tool part. In this way, any disturbing influences of processing equipment, which are not part of the activated device pairing avoided. The same applies in the case of the machine tool according to claim 11.
• At least one counter device can be converted under gravity into its non-functional position.
• Way tool elements such as return springs, can be saved.
• At least one counter-device is designed as a processing punch, in particular as a forming punch.
• multiple tools according to the invention can be used, in particular, to create transformations extending from the workpiece plane in the direction of the first tool part connected to a lifting drive. If the second tool part is the lower tool part, then upward transformations are possible. Upwardly directed deformations have the advantage over downwards forming that they do not collide with a workpiece table supporting the workpiece.
• a compact design of the tool according to the invention results according to claim 7, by the counter-devices follow one another about the activation axis of rotation. Alternatively or additionally, the same applies to the processing equipment.
• the activation rotational movement is performed about a tool axis of rotation about which the tool parts are rotatable by means of the rotary drive. So usually existing tool rotary actuators are used for the activation rotary motion.
• an indexing switching device for the second tool part is provided on the machine tool according to claim 10.
• the indexing switching device either an activation rotational movement of the rotationally adjustable activation element can be easily achieved.
• a corresponding Indexier-switching device is provided for the first tool part. Consequently, both the part of the rotary drive for the first tool part and the part of the rotary drive for the second tool part for the activation rotary movement and the respective joint rotation of the tool parts can be used.
• a highly flexible machine tool results according to claim 13, by a lifting drive is also provided for the second tool part.
• a working stroke can be carried out by means of the lifting drive for the first tool part and / or by means of the lifting drive for the second tool part.
• FIG. 1 shows a schematic representation of a machine tool for cutting and / or forming sheet metal
• FIG. 3 shows a sectional view of the upper tool part of the tool of Figure 2 and
• FIG. 4 shows a sectional view of the lower tool part of the tool from FIG. 2.
• a machine tool 1 comprises a tool 2 with a first tool part in the form of an upper tool 4 drivingly connected to a lifting drive 3 and with a second tool part! in the form of a lower tool 5.
• the upper tool 4 is clamped to an upper tool holder 6, the lower tool 5 to a lower tool holder 7.
• Both tool parts are arranged along a stroke axis 8 defined by the lifting drive 3 and assigned to each other along the lifting axis 8 opposite sides of a sheet 9 to be processed.
• the sheet 9 resting on a workpiece table 10 is moved relative to the tool 2 by means of a coordinate guide 11.
• the upper tool 4 can be raised and lowered by means of the lifting drive 3 along the lifting axis 8.
• the lower tool 5 can also be raised and lowered along the lifting axis 8 by means of a lifting drive 12 (not shown).
• a respective rotary drive 13 on the upper tool holder 6 and on the lower tool holder 7, the upper tool 4 and the lower tool 5 are rotatable about a tool rotation axis 14.
• indexing switching devices 15 and 16 which are illustrated in a simplified form as pinions, are provided on the upper tool holder 6 and on the lower tool holder 7.
• All drives of the machine tool 1 are controlled by a central numerical control unit 17. - -
• the tool 2 from FIG. 1 on the upper tool 4 has five different machining devices in the form of threading dies, to which the reference numeral 20 is assigned in its entirety.
• Each of the pull-through matrices 20 is associated with a counter-device in the form of a pull-through punch on the lower tool 5.
• the five puncture punches are designated in their entirety by the reference numeral 21 and are covered in Figure 2 by a workpiece support 22 of the lower tool 5. Only the tip of a passage punch 21.1 is visible in an opening of the workpiece support 22.
• passages of five different sizes can be created on the sheet 9 to be machined, without requiring a tool change.
• the upper tool 4 On a base body 23, the upper tool 4 has a shaft 24, by means of which the upper tool 4 is clamped in the upper tool holder 6.
• a provided with a toothing 25 activation element 26 is rotatably mounted on the main body 23 of the upper tool 4 about the tool axis of rotation 14.
• the lower tool 5 has a base body 27 on which an activation element 28 with a toothing 29 is rotatable about the tool rotation axis 14.
• the activation elements 26 and 28 are parts of activation devices of the upper tool 4 and the lower tool 5, whose operation is explained below.
• the upper tool 4 and the lower tool 5 are illustrated in a sectional view along a device pairing activated for workpiece machining with a passage die 20.1 and the passage punch 21.1.
• the base body 27 of the lower tool 5 has a base plate 30 and a guide plate 32 connected to the base plate 30 by means of a screw connection 31.
• An anti-rotation device 33 fixes the guide plate 32 in a defined rotational position relative to the base plate 30.
• the guide plate 32 has five guide holes 34 which follow one another along a circular path around the tool axis of rotation 14 and of which one can be seen in FIG.
• the guide holes 34 form slideways for the along the lifting axis 8 relative to the guide plate 32 displaceable pass-through punch 21. Accordingly, the passage punch 21 are arranged on a circular path about the tool axis of rotation 14.
• the guide plate 32 Furthermore, on the guide plate 32 five ball bushings 35 are provided, which are part of guides 36 for the workpiece support 22.
• An annular recess 37 on the upper side of the guide plate 32 serves to receive a spring element in the form of an elastic ring 38.
• the workpiece support 22 is resiliently supported on the guide plate 32 by means of the elastic ring 38.
• the pot-like activation element 28 of the lower tool 5 is rotatably mounted relative to the base plate 30 and the guide plate 32 about the tool axis of rotation 14.
• An annular bottom 39 of the activation element 28 rises in the circumferential direction in the manner of a ramp and has a starting slope 40.
• That passage punch which is part of the activated device pairing, held in its functional position.
• the punch-through punch 21.1 is in its workpiece-near functional position. If the passage punch 21.1 is subjected to a downward force during workpiece machining, the approach slope 40 prevents the passage punch 21.1 from being displaced downwardly into an inoperative position along the guide bore 34 running parallel to the lift axis 8.
• the activation element 28 In order to transfer the passage punch 21.1 into an inoperative position, the activation element 28 is rotated about the tool rotation axis 14 with an activation rotary movement until the approach slope 40 is no longer arranged below the passage punch 21.1. Under the effect of gravity, the pull-through punch 21.1 slides down from its functional position into its working-distance, inoperative position. Instead of the passage punch 21.1 another one of the punch 21 is now activated for the workpiece machining.
• the lower tool 5 has a plurality of depressions, in which, depending on the rotational position of the activation element 28, a spring-loaded detent ball 41 engages.
• the function of the locking ball 41 will be described below in connection with the sequences during the activating rotational movement.
• the base body 23 of the upper tool 4 is constructed according to the main body 27 of the lower tool 5. It has a base plate 43 and a guide plate 44 connected to the base plate 43 and secured against rotation.
• the passage matrices 20 are displaceably mounted on guide bores 45 of the guide plate 44 along the stroke axis 8.
• the activation device of the upper tool in accordance with the activation device of the lower tool 5, has a rotationally adjustable activation element 26 with a starting slope 46 arranged between the base plate 43 and the guide plate 44.
• the Anfahrschräge 46 is disposed in Figure 3 on the pull-through die 20.1. Consequently, the passage matrix 20.1 also remains in an upwardly directed application of force in a workpiece-near functional position.
• the four non-activated draft matrices are also in their functional position. For example, this is evident from the pull-through matrix 20.2. But they are in the Workpiece processing subjected to an upward force, they move from their functional position upwards in a non-functional position. For example, such a force application can be caused by a deformation already present on the sheet 9 to be processed.
• the sheet 9 to be processed is positioned by means of the coordinate guide 11 over the punch-through punch 21.1 and under the pull-through die 20.1.
• the sheet metal 9 to be machined rests on the workpiece support 22 of the lower tool 5.
• the upper tool 4 is lowered by means of the lifting drive 3 jointly with the pull-through matrices 20, in particular the pull-through matrix 20.1, along the lifting axis 8 in the direction of the lower tool 5 Put the pull-through matrices 20 on top of the sheet metal 2.
• the working stroke is carried out by means of the lifting drive 3 for the O berwerkmaschine 4.
• the working stroke can also be effected by means of the lifting drive 12 for the lower tool 5 or even superimposed by means of both lifting drives 3 and 12.
• the upper tool 4 and the lower tool 5 are again moved apart along the lifting axis 8.
• the workpiece support 22 is under the action of the Eladurringes 38 back to its original position and presses the processed sheet 2 of the punch 21.1. Accordingly, the workpiece support 22 serves as Maschinen Swissabstreifer for the passage punch 21st
• the rotationally adjustable activating element 28 of the lower tool 5 is rotated with an activating rotational movement relative to the passage punches 21. This is accompanied by a rotational movement of the activation element 28 also relative to the base plate 30 of the guide plate 32 and the workpiece support 22.
• the activation rotational movement takes place about the tool axis of rotation 14, which consequently forms an activation axis of rotation.
• the activation rotational movement ends when the Auffahrschräge 40 is disposed under the to be activated punch. - -
• the activation element 26 of the upper tool 4 is rotated with an activation rotational movement about the tool rotation axis 14 relative to the passage matrices 20 until the approach slope 46 of the activation element 26 is arranged above the passage die to be activated.
• the activation rotational movements of the activation element 28 are realized by means of the machine-side rotary drive 13.
• the activation element 28 has the toothing 29.
• the machine-side, engaging in the toothing 29, for simplicity as a pinion shown indexing switching device 16 can be at a rotation of the main body 27 of the lower tool 5 to the tool rotation axis 14 either a rotation of the activation element 28 simultaneously with the main body 27 to (first switching state ) or prevents the activation element 28 at a common rotational movement with the main body 27 (second switching state). If the activation element 28 is prevented from rotating with the base body 27, rotation of the base body 27 causes a relative movement of the base body 27 and the passage punch 21 mounted on the base body 27 with respect to the activation element 28.
• the joint rotation of the activation element 28 and the base body 27 in the first switching state of the indexing switching device 16 serves to align the passage punch 21 relative to the sheet 9 to be machined about the tool axis of rotation 14.
• An undesired rotation of the activation element 28 relative to the base body 27 is characterized by the Detent ball 41 prevents.
• the control of the activation rotational movement of the activation element 26 on the upper tool 4 by means of the Indexier-switching device 15 is carried out according to the control of the activation rotational movement of the activation element 28 of the lower tool fifth
• the bottom 39 of the activation element 28 of the lower tool has 5 recesses, through which can be removed after removal of the base plate 30 to be replaced pull-through punch 21 down.
• the replacement of worn or destroyed puncture punches 21 can therefore be carried out in a simple manner after loosening the screw 31.
• Modified designs of the tool 2 may, for example, instead of stamping dies and forming dies also have punches and punching dies. Furthermore, notwithstanding the illustrated tool, the processing devices and / or the counter-devices can be returned to their non-functional position by means of spring elements.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Punching Or Piercing (AREA)
• Shaping Metal By Deep-Drawing, Or The Like (AREA)
• Turning (AREA)
• Milling, Broaching, Filing, Reaming, And Others (AREA)
• Lead Frames For Integrated Circuits (AREA)
• Other Surface Treatments For Metallic Materials (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

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Family Applications (1)

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Cited By (1)

Families Citing this family (17)

Citations (2)

Family Cites Families (6)

• 2006
  • 2006-10-18 DE DE102006049046A patent/DE102006049046A1/de not_active Withdrawn
• 2007
  • 2007-09-28 WO PCT/EP2007/008449 patent/WO2008046501A1/de active Application Filing
  • 2007-09-28 AT AT07818532T patent/ATE496710T1/de active
  • 2007-09-28 JP JP2009532699A patent/JP5185941B2/ja not_active Expired - Fee Related
  • 2007-09-28 DE DE200750006390 patent/DE502007006390D1/de active Active
  • 2007-09-28 EP EP20070818532 patent/EP2081707B1/de not_active Not-in-force
  • 2007-09-28 CN CN2007800386626A patent/CN101528377B/zh not_active Expired - Fee Related
• 2009
  • 2009-04-16 US US12/424,802 patent/US8201435B2/en active Active

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